When sound strikes a surface, some of the sound gets absorbed by the surface and

When ice cubes are added to still water, they melt much slower than when they

When you walk or run, your body uses only the slow-twitch muscle fibres to drive

After tea leaves are plucked, they are taken to a tea factory where they are

Solar panels use sunlight to make electricity.

In most cases, the mobile number is recycled within 30 to 60 days.

The black and white stripes on things you buy at shops are called a barcode.

The weather and rainfall patterns are changing because the Earth’s temperature is rising and the

Magnets are found everywhere— hard drives that store data on your computer are coated with

A tree’s roots cannot grow after the tree is cut down because roots need nutrients